Diesel sales nearly died after the Volkswagen emission-rigging scandal, but some technologies are hard to kill. The company says sales of diesel cars have nearly returned to normal. They still have a way to go but Volkswagen seemingly has overcome its blackened reputation. PR apparently had little to do with it. Diesel cars are less expensive to run in Europe and the fuel is widely available. Moreover, the infrastructure for electric vehicles is not yet in place. So, even though it is a dirtier engine, it has years more to run. Volkswagen is making efforts in building battery-powered cars but it has a long way to go. Tesla doesn’t have competition yet.